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A plural of rectum.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
rec·tum, pl. rectums, recta (rek'tŭm, -tŭmz, -tă) [TA]
The terminal portion of the digestive tube, extending from the rectosigmoid junction to the anal canal.
[L. rectus, straight, pp. of rego, to make straight]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012